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AD9954 synchronisation

Question asked by dobarak on Apr 12, 2016
Latest reply on Apr 26, 2016 by JLKeip


Assuming I have single ad9954 on my board and it doesn't need to be synchronized:

1) I plan to turn off sync_clk output, what should I do with sinc_in pin?

2) Which synchrinization mode I need to configure?

3) I drive IO_UPDATE from async uController, I can't meet setup/hold requirment vs sync_clk (I can only make it wide), I dont really care if the update will ocour on the current or next sync_clk, do u see any problem.

4) I plan to work with refclk=100MHz, sysclk=400MHz, my output will be a 100MHz +/- upto 20KHz. after updating new FTW, will it output drift smotohly?